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CVE-2024-52804— Tornado has HTTP cookie parsing DoS vulnerability

Quick assessment

Affected
tornadoweb tornado
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tornado是中国龙卷风科技（Tornado）社区的一个Python Web框架和异步网络库。该库通过使用非阻塞网络I / O，可以扩展到成千上万的开放连接，使其非常适合 长时间轮询， WebSocket和其他需要与每个用户建立长期连接的应用程序。 Tornado 6.4.2之前版本存在安全漏洞，该漏洞源于用于解析 HTTP Cookie 的算法有时具有二次复杂度，导致在解析恶意制作的 Cookie 标头时 CPU 消耗过多。

CVSS 7.5 · High EPSS 1.04% · P63

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-52804

Vulnerability Information
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Vulnerability Title
Tornado has HTTP cookie parsing DoS vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Tornado is a Python web framework and asynchronous networking library. The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. Version 6.4.2 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Tornado 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tornado是中国龙卷风科技（Tornado）社区的一个Python Web框架和异步网络库。该库通过使用非阻塞网络I / O，可以扩展到成千上万的开放连接，使其非常适合 长时间轮询， WebSocket和其他需要与每个用户建立长期连接的应用程序。 Tornado 6.4.2之前版本存在安全漏洞，该漏洞源于用于解析 HTTP Cookie 的算法有时具有二次复杂度，导致在解析恶意制作的 Cookie 标头时 CPU 消耗过多。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tornadoweb tornado < 6.4.2 -

II. Public POCs for CVE-2024-52804

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7408 chars
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III. Intelligence Information for CVE-2024-52804

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Vendor Advisories for CVE-2024-52804 (1)

IV. Related Vulnerabilities

Same product: tornado
Same vendor: tornadoweb
Same weakness: CWE-400

V. Comments for CVE-2024-52804

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